CN112222654A - Welding process for enamel inner container of water heater - Google Patents
Welding process for enamel inner container of water heater Download PDFInfo
- Publication number
- CN112222654A CN112222654A CN202010898724.8A CN202010898724A CN112222654A CN 112222654 A CN112222654 A CN 112222654A CN 202010898724 A CN202010898724 A CN 202010898724A CN 112222654 A CN112222654 A CN 112222654A
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- liner
- enamel
- inner container
- blank
- welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00 relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Cookers (AREA)
Abstract
The invention provides a welding process of an enamel liner of a water heater, wherein a blank of the enamel liner is spherically convex at one end and bowl-shaped concave at the other end, a welding point is reduced by adopting a reverse butt welding mode, the joint heat influence is small, the condensation time of the liner is short, the fatigue strength of a welding joint of a liner end cover reaches 32%, the novel enamel liner replaces the traditional liner structure, and the liner is tighter, the heat preservation effect is better, the electric power resource is effectively saved and the service life of the liner is effectively prolonged on the premise of not increasing the manufacturing cost through the reverse connection design of the end cover and the liner main body.
Description
Technical Field
The invention relates to the technical field of water heater inner containers, in particular to a welding process of an enamel inner container of a water heater.
Background
The water heater stores water through the inner container, and finishes water heating by the heating element, directly take the hot water in the water heater inner container and mix with cold water when using, obtain the function of releasing hot water for a long time, and the inner container of the water storage type water heater at present mainly is by stainless steel inner container, galvanized inner container, enamel inner container, etc., because the inner container is a container to hold water, and the enamel inner container coats a layer of enamel glaze layer in the steel sheet inner wall, isolate the contact with steel sheet and avoid the steel sheet to corrode and cause and leak through the glaze layer, such inner container is the most common in the market at present, also relatively durable.
The existing electric water heater usually consumes electricity, because the enamel inner container on the market has poor heat preservation effect due to the problems of the design of the end cover and the main body, and the electric power consumption is caused by the continuous heating of the water in the inner container by consuming the electric power.
Disclosure of Invention
In order to solve the problems, the invention provides a welding process of an enamel inner container of a water heater, which is characterized by comprising the following steps:
(1) preparing end covers at the left end and the right end of an enamel liner blank, cutting the end covers according to the designed size, and processing the end covers into a shape with a certain radian protruding outwards by a forming process;
(2) preparing a liner wall body of an enamel liner blank, cutting the material according to the designed size, and processing and forming by a forming process;
(3) manufacturing a liner blank and forming; the detailed steps are as follows;
1, assembling and clamping an end cover and a liner wall body by using a clamp, sending the end cover and the liner wall body to an area to be welded, and scanning and positioning through image pixel coordinates;
2, welding tracks of the welding machine are carried out according to the movement tracks positioned by the coordinates, and unilateral welding is completed;
3, adjusting the angle of the other end cover to the same-direction angle of the upper end cover, assembling and clamping the inner container wall by using a clamp, sending the end cover and the inner container wall to an area to be welded, and scanning and positioning through image pixel coordinates;
4, welding tracks of a welding machine are carried out according to the movement tracks of coordinate positioning, and blank welding of the enamel liner is completed, so that one end of the blank of the enamel liner is in a spherical shape and is protruded, and the other end of the blank of the enamel liner is in a bowl shape and is sunken;
(4) polishing the blank of the enamel liner for 480 seconds and 600 seconds;
(5) deoiling, cleaning and drying the blank of the enamel inner container;
(6) carrying out rough removal treatment on a formed blank of the enamel liner;
(7) and spraying enamel on the formed enamel liner.
Further, the three-dimensional calibration block is placed in the visual detection area through the image pixel coordinates, the three-dimensional calibration block is photographed through an industrial camera, and the pixel coordinates (x, y, z) on the three-dimensional calibration block image are obtained.
Further, coordinates of three points D1, D2 and D3 in a contour edge of a welding pattern are obtained, wherein D1 is a starting point of the contour edge, D3 is an end point of the contour edge, when x is 0.5, the contour edge passes through D2 points, and a tangent vector is D3-D1; the value of A, B, C was determined by D1, D2, D3,
and finishing the fitting of a quadratic spline curve.
Furthermore, in the step of forming the liner blank, the wire feeding angle at one end of the upper end enclosure is 120 degrees,
one end of the lower end socket has a wire feeding angle of 70 degrees.
Further, the roughening treatment is polishing by adopting a centerless grinding machine, and then polishing by using a grinding wheel to remove burrs, wherein the average polishing time of the centerless grinding machine is 600-800 seconds, and the average polishing time of the grinding wheel is 500-600 seconds.
Further, the spraying enamel adopts spraying equipment to spray the enamel on the inner surface and the outer surface of the liner, and the enamel coating thickness is 130-150 μm.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a welding process of an enamel liner of a water heater, which reduces welding points by adopting a reverse butt welding mode, has small joint heat influence, short condensation time of the liner, 32% of fatigue strength of a welding joint of a liner end cover, replaces the traditional liner structure with a novel enamel liner, and ensures that the liner is tighter, the heat preservation effect is better, the electric power resource is effectively saved and the service life of the liner is effectively prolonged on the premise of not increasing the manufacturing cost by the reverse connection design of the end cover and the liner main body.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
in the description of the present invention, it is to be understood that the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of sub-description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention; furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, the definitions "first" and "second" are for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly including one or more of such features.
The invention provides a welding process of an enamel liner of a water heater, which comprises a liner wall body 1 and an end cover 2 shown in the attached drawings, wherein the welding process comprises the following steps:
(1) preparing end covers at the left end and the right end of an enamel liner blank, cutting the end covers according to the designed size, and processing the end covers into a shape with a certain radian protruding outwards by a forming process;
(2) preparing a liner wall body of an enamel liner blank, cutting the material according to the designed size, and processing and forming by a forming process;
(3) manufacturing a liner blank and forming; the detailed steps are as follows:
1, assembling and clamping an end cover and a liner wall body by using a clamp, sending the end cover and the liner wall body to an area to be welded, and scanning and positioning through image pixel coordinates;
2, welding tracks of the welding machine are carried out according to the movement tracks positioned by the coordinates, and unilateral welding is completed;
3, adjusting the angle of the other end cover to the same-direction angle of the upper end cover, assembling and clamping the inner container wall by using a clamp, sending the end cover and the inner container wall to an area to be welded, and scanning and positioning through image pixel coordinates;
4, welding tracks of a welding machine are carried out according to the movement tracks of coordinate positioning, and blank welding of the enamel liner is completed, so that one end of the blank of the enamel liner is in a spherical shape and is protruded, and the other end of the blank of the enamel liner is in a bowl shape and is sunken;
(4) polishing the blank of the enamel liner for 480 seconds and 600 seconds;
(5) deoiling, cleaning and drying the blank of the enamel inner container;
(6) carrying out rough removal treatment on a formed blank of the enamel liner;
(7) and spraying enamel on the formed enamel liner.
The invention provides a welding process of an enamel liner of a water heater, which reduces welding points by adopting a reverse butt welding mode, has small joint heat influence, short condensation time of the liner, 32% of fatigue strength of a welding joint of a liner end cover, replaces the traditional liner structure with a novel enamel liner, and ensures that the liner is tighter, the heat preservation effect is better, the electric power resource is effectively saved and the service life of the liner is effectively prolonged on the premise of not increasing the manufacturing cost by the reverse connection design of the end cover and the liner main body.
The three-dimensional calibration block is placed in the visual detection area through the image pixel coordinates, the three-dimensional calibration block is photographed through an industrial camera, pixel coordinates (x, y and z) on an image of the three-dimensional calibration block and image pixel coordinates are obtained, an image coordinate system x and y expressed by physical units are required to be established, the origin of the coordinates is firstly determined, and then a specific detailed three-dimensional calibration is obtained.
Acquiring coordinates of three points D1, D2 and D3 in a contour edge of a welding pattern, wherein D1 is a starting point of the contour edge, D3 is an end point of the contour edge, when x is 0.5, the contour edge passes through a D2 point, and a tangent vector is D3-D1; the value of A, B, C was determined by D1, D2, D3, completing a quadratic spline curve fit.
In the step of forming the inner container blank, the wire feeding angle of one end of the inner container blank, which protrudes out of the end cover, is 120 degrees, the wire feeding angle of one end of the inner container blank, which is sunken into the end cover, is 70 degrees, the traditional wire feeding angle with two equal ends is effectively replaced, and the cost is saved.
The roughening treatment is that centerless grinding polishing is adopted, and then the grinding wheel is used for polishing and roughening, wherein the average polishing time of the centerless grinding polishing is 600-800 seconds, and the average polishing time of the grinding wheel is 500-600 seconds.
The spraying enamel is sprayed on the inner surface and the outer surface of the inner container by adopting spraying equipment, and the enamel coating thickness is 130-150 mu m.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The welding process of the enamel inner container of the water heater is characterized by comprising the following steps of:
(1) preparing end covers at the left end and the right end of an enamel liner blank, cutting the end covers according to the designed size, and processing the end covers into a shape with a certain radian protruding outwards by a forming process;
(2) preparing a liner wall body of an enamel liner blank, cutting the material according to the designed size, and processing and forming by a forming process;
(3) manufacturing a liner blank and forming; the detailed steps are as follows:
firstly, assembling and clamping an end cover and a liner wall body by using a clamp, sending the end cover and the liner wall body to an area to be welded, and scanning and positioning through image pixel coordinates;
secondly, welding tracks of the welding machine are carried out according to the movement tracks positioned by coordinates, and unilateral welding is completed;
regulating the angle of the other end cover to the same angle of the upper end cover and the wall of the inner container, assembling and clamping the end cover and the wall of the inner container by using a clamp, sending the end cover and the wall of the inner container to an area to be welded, and scanning and positioning the end cover by using image pixel coordinates;
fourthly, welding tracks of a welding machine are carried out according to the movement track of coordinate positioning, and blank welding of the enamel liner is completed, so that one end of the blank of the enamel liner is in a spherical shape and is protruded, and the other end of the blank of the enamel liner is in a bowl shape and is sunken;
(4) polishing the blank of the enamel liner for 480 seconds and 600 seconds.
(5) Deoiling, cleaning and drying the blank of the enamel inner container;
(6) carrying out rough removal treatment on a formed blank of the enamel liner;
(7) and spraying enamel on the formed enamel liner.
2. The welding process of the enamel inner container of the water heater as claimed in claim 1, wherein: and the three-dimensional calibration block is placed in the visual detection area by the image pixel coordinate, and the three-dimensional calibration block is photographed by an industrial camera to obtain the pixel coordinate (x, y, z) on the three-dimensional calibration block image.
3. The welding process of the enamel inner container of the water heater as claimed in claim 1, wherein: acquiring coordinates of three points D1, D2 and D3 in a contour edge of a welding pattern, wherein D1 is a starting point of the contour edge, D3 is an end point of the contour edge, when x is 0.5, the contour edge passes through a D2 point, and a tangent vector is D3-D1; the value of A, B, C was determined by D1, D2, D3, completing a quadratic spline curve fit.
4. The welding process of the enamel inner container of the water heater as claimed in claim 1, wherein: in the step of manufacturing the inner container blank and forming, the wire feeding angle at one end of the upper end enclosure is 120 degrees, and the wire feeding angle at one end of the lower end enclosure is 70 degrees.
5. The welding process of the enamel inner container of the water heater as claimed in claim 1, wherein: the roughening treatment is that centerless grinding polishing is adopted, and then the grinding wheel is used for polishing and roughening, wherein the average polishing time of the centerless grinding polishing is 600-800 seconds, and the average polishing time of the grinding wheel is 500-600 seconds.
6. The welding process of the enamel inner container of the water heater as claimed in claim 1, wherein: the spraying enamel is sprayed on the inner surface and the outer surface of the inner container by adopting spraying equipment, and the enamel coating thickness is 130-150 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898724.8A CN112222654A (en) | 2020-08-31 | 2020-08-31 | Welding process for enamel inner container of water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898724.8A CN112222654A (en) | 2020-08-31 | 2020-08-31 | Welding process for enamel inner container of water heater |
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| Publication Number | Publication Date |
|---|---|
| CN112222654A true CN112222654A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010898724.8A Pending CN112222654A (en) | 2020-08-31 | 2020-08-31 | Welding process for enamel inner container of water heater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975074A (en) * | 2021-03-10 | 2021-06-18 | 宁波华宝弘瑞五金有限公司 | Novel welding process |
| CN116511845A (en) * | 2023-05-25 | 2023-08-01 | 西安鑫龙机械铸造有限公司 | Corrosion-resistant high-temperature-resistant thermocouple protective sleeve and part enamel process |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170857A (en) * | 1996-07-15 | 1998-01-21 | 陈奇能 | Method for producing inner tube of electric water heater |
| CN204438530U (en) * | 2015-01-23 | 2015-07-01 | 梁荣顺 | A kind of New-type water heater inner bag |
| CN205519978U (en) * | 2016-04-01 | 2016-08-31 | 黄永伟 | Air source heat pump inner water tank outer coiled tube soldering equipment |
| CN107825000A (en) * | 2017-12-07 | 2018-03-23 | 巨浪(苏州)热水器有限公司 | A kind of preparation method of water heater liner |
| CN207162955U (en) * | 2017-08-22 | 2018-03-30 | 合肥美的暖通设备有限公司 | Enamel inner container and there is its water heater |
| CN207299540U (en) * | 2017-10-16 | 2018-05-01 | 合肥美的暖通设备有限公司 | Water tank and water heater |
| CN108931057A (en) * | 2017-05-26 | 2018-12-04 | 山西荣申达科技有限公司 | A kind of external coiled pipe type enamel cistern heat-exchange inner container |
| CN111284813A (en) * | 2020-03-27 | 2020-06-16 | 江苏光芒新能源股份有限公司 | An enamel built-in coil tube liner |
| CN111390421A (en) * | 2018-12-30 | 2020-07-10 | 广州智信科技有限公司 | Welding method |
-
2020
- 2020-08-31 CN CN202010898724.8A patent/CN112222654A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1170857A (en) * | 1996-07-15 | 1998-01-21 | 陈奇能 | Method for producing inner tube of electric water heater |
| CN204438530U (en) * | 2015-01-23 | 2015-07-01 | 梁荣顺 | A kind of New-type water heater inner bag |
| CN205519978U (en) * | 2016-04-01 | 2016-08-31 | 黄永伟 | Air source heat pump inner water tank outer coiled tube soldering equipment |
| CN108931057A (en) * | 2017-05-26 | 2018-12-04 | 山西荣申达科技有限公司 | A kind of external coiled pipe type enamel cistern heat-exchange inner container |
| CN207162955U (en) * | 2017-08-22 | 2018-03-30 | 合肥美的暖通设备有限公司 | Enamel inner container and there is its water heater |
| CN207299540U (en) * | 2017-10-16 | 2018-05-01 | 合肥美的暖通设备有限公司 | Water tank and water heater |
| CN107825000A (en) * | 2017-12-07 | 2018-03-23 | 巨浪(苏州)热水器有限公司 | A kind of preparation method of water heater liner |
| CN111390421A (en) * | 2018-12-30 | 2020-07-10 | 广州智信科技有限公司 | Welding method |
| CN111284813A (en) * | 2020-03-27 | 2020-06-16 | 江苏光芒新能源股份有限公司 | An enamel built-in coil tube liner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975074A (en) * | 2021-03-10 | 2021-06-18 | 宁波华宝弘瑞五金有限公司 | Novel welding process |
| CN116511845A (en) * | 2023-05-25 | 2023-08-01 | 西安鑫龙机械铸造有限公司 | Corrosion-resistant high-temperature-resistant thermocouple protective sleeve and part enamel process |
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Application publication date: 20210115 |
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| RJ01 | Rejection of invention patent application after publication |